NEW HAVEN, Conn., April 30, 2014 (GLOBE NEWSWIRE) -- Achillion Pharmaceuticals, Inc. (Nasdaq:ACHN) today announced that is has begun dosing study participants with ACH-3422, Achillion's proprietary uridine-analog nucleotide inhibitor, in a Phase 1 clinical trial. ACH-3422 is being developed for use in combination regimens to treat chronic hepatitis C viral infection (HCV). Achillion also announced the initiation of dosing in a Phase 2 pilot study evaluating ACH-3102, Achillion's second-generation NS5A inhibitor, in combination with sofosbuvir for eight and potentially six weeks of treatment for patients with chronic genotype 1 treatment-naïve HCV.